. American engineer and railroad journal . DETAIL OF JIG FOR FACING MAIN VALVE SEAT—\ AIR PUMP. head to the plate pass through the holes in the head, which arein a standard position and thus assure the alignment of thevalve seat with the shaper ram. GRINDING DRY PIPE JOINTS. A machine for grinding the joints between the dry pipe andT-head is shown in the accompanying illustration. This consists of a framework made of plate and angles, whichis mounted on a pivot secured to the small stand resting on thefloor. The T-head is secured in this frame and the dry pipe issupported in a ver
. American engineer and railroad journal . DETAIL OF JIG FOR FACING MAIN VALVE SEAT—\ AIR PUMP. head to the plate pass through the holes in the head, which arein a standard position and thus assure the alignment of thevalve seat with the shaper ram. GRINDING DRY PIPE JOINTS. A machine for grinding the joints between the dry pipe andT-head is shown in the accompanying illustration. This consists of a framework made of plate and angles, whichis mounted on a pivot secured to the small stand resting on thefloor. The T-head is secured in this frame and the dry pipe issupported in a vertical position directly above, it being held by. GENERAL VIEW OF DEVICE FOR GRINDING DRY PIPE JOINTS. 14S AMERICAN ENGINEER AND RAILROAD JOURNAL. clamps extending out from the wall. A rod connects an armfrom the frame to a crank connection on a short shaft in abrackets secured near by, that is dr/vcn by a small air motor. The pivot supporting the oscillating frame can be raised andlowered a distance of a couple of inches by means of a smallair cylinder located beneath it. In operation, after the pipe hasbeen clamped in place and the T-head secured in the frameworkthe oil and emery are placed on the joint and air is admitted tothe small cylinder below which lifts the frame until practicallythe whole weight of the dry pipe is supported. The air motor isthen started and the lower part oscillated at a fairly rapid rateand through a wide arc. Whenever it is necessary to renew thegrinder the air is released from the lifting cylinder and the jointseparated. A similar arrangement has been designed for grinding the drypipe in the front tube
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
